The NYNH&H designated its towers as "Signal Stations," hence "SS." The letter "K" indicated a movable bridge, and the numbers were assigned to specific signal stations. This bridge spans the Seekonk River between Providence and East Providence, which is straight ahead. The track to the right leads to Bristol, R.I., while the track to the left leads to Red Bridge, named after a nearby highway span over the river that was also movable. At Red Bridge, which was a junction point, straight iron would take a rider to Philipsdale, Darlington, and Valley Falls (six miles distant).The diverging move to the right would take a train to Rumford, Slater, Narragansett Park (where the ponies ran, and so did New Haven passenger extras from Boston and Providence), Daggetts, and East Jct., where the branch joined up with the double-tracked Boston-Providence main line. Ca. 1954.